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**NAME**

Grid_getCellCoords

**SYNOPSIS**

Grid_getCellCoords(integer(IN) :: axis, integer(IN) :: blockID, integer(IN) :: edge, logical(IN) :: guardcell, real(OUT) :: coordinates(size), integer(IN) :: size)

**DESCRIPTION**

This subroutine is an accessor function that gets the coordinates of the cells in a given block. Coordinates are retrieved one axis at a time, meaning you can get the i, j, _or_ k coordinates with one call. If you want all the coordinates, all axes, you need to call Grid_getCellCoords 3 times, one for each axis. The code carries coordinates at cell centers as well as faces. It is possible to get coordinates for CENTER, only LEFT_EDGE, only RIGHT_EDGE or for all FACES along a dimension.

**ARGUMENTS**

axis - specifies the integer index coordinates of the cells being retrieved. axis can have one of three different values, IAXIS, JAXIS or KAXIS (defined in constants.h as 1,2 and 3) blockID - integer block number edge - integer value with one of four values, LEFT_EDGE, RIGHT_EDGE, CENTER or FACES The edge argument specifies what side of the zone to get, the CENTER point, the LEFT_EDGE or the RIGHT_EDGE of the zone. FACES gets the left and right face of each cell, but since two adjacent cells have a common face, there are only N+1 unique values if N is the number of cells. guardcell - logical input. If true coordinates for guardcells are returned along with the interior cells, if false, only the interior coordinates are returned. coordinates - The array holding the data returning the coordinate values coordinates must be at least as big as "size" (see below) size - integer specifying the size of the coordinates array. if edge = CENTER/LEFT_EDGE/RIGHT_EDGE then If guardcell true then size = interior cells + 2*guardcells otherwise size = number of interior cells If edge=FACES If guardcell true then size = interior cells + 2*guardcells+1 otherwise size = number of interior cells+1

**EXAMPLE**

1. Getting cell centered values #include "constants.h" #include "Flash.h" integer :: coordSize integer :: xCoord(coordSize) !sized to be number of coords returned do i=1, localNumBlocks !get the index limits of the block call Grid_getBlkIndexLimits(i, blkLimits, blkLimitsGC) !holds the number of cells returned in idir coordSize = blkLimitsGC(HIGH, IAXIS) call Grid_getCellCoords(IAXIS, i, CENTER, .true., xCoord, coordSize) end do 2. Getting face values #include "constants.h" #include "Flash.h" integer :: coordSize integer :: xCoord(coordSize) !sized to be number of coords returned do i=1, localNumBlocks !get the index limits of the block call Grid_getBlkIndexLimits(i, blkLimits, blkLimitsGC) !holds the number of cells returned in idir coordSize = blkLimitsGC(HIGH, IAXIS)+1 call Grid_getCellCoords(IAXIS, i, FACES, .true., xCoord, coordSize) end do

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